J.K. Schaffer exits preseason game with head injury

(8/16/14) Bengals linebacker J.K. Schaffer left Saturday's preseason game against the Jets after taking a shot to the head. He was ruled out for the remainder of the game.

Bengals add LB, waive DE from roster

by Michael Hurcomb | CBSSports.com

(10/29/13) The Bengals made a pair of roster moves Tuesday. The promoted linebacker J.K. Schaffer from from the practice squad and released DeQuin Evans, who just finished serving an eight-game suspension for violating the NFL's performance-enhancing substance policy.